Unusual find.
A photo mask made by Electromask/TRW for manufacturing chips
and the chips cut from a wafer made from it.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170912720589
A photo mask made by Electromask/TRW for manufacturing chips
and the chips cut from a wafer made from it.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170912720589